Using terahertz time-domain spectroscopy, we have measured the temperature dependence of the far-infrared vibrational modes of a number of illegal drugs and high explosives that are of interest to the forensic and security services. Well-resolved low-frequency absorption peaks were observed in the frequency range 0.3 - 3.0 THz and over the temperature range 4 - 296K, some of which were found to become more intense and shift to higher frequencies as the temperature was reduced. Our results confirm that the low-frequency collective modes are highly sensitive to the structural and spatial arrangement of molecules.
Temperature-Dependent Far-Infrared Spectra of Explosives and Drugs Measured by Terahertz Time-Domain Spectroscopy
01.09.2006
1256070 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Terahertz time-domain spectroscopy probes materials
British Library Online Contents | 1998
|High resolution terahertz time-domain spectroscopy
IEEE | 2004
|British Library Online Contents | 2017
|